2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
36 #include "debugfs_netdev.h"
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
46 } __attribute__ ((packed));
49 /* must be called under mdev tx lock */
50 void ieee80211_configure_filter(struct ieee80211_local *local)
52 unsigned int changed_flags;
53 unsigned int new_flags = 0;
55 if (atomic_read(&local->iff_promiscs))
56 new_flags |= FIF_PROMISC_IN_BSS;
58 if (atomic_read(&local->iff_allmultis))
59 new_flags |= FIF_ALLMULTI;
62 new_flags |= FIF_BCN_PRBRESP_PROMISC;
64 if (local->fif_fcsfail)
65 new_flags |= FIF_FCSFAIL;
67 if (local->fif_plcpfail)
68 new_flags |= FIF_PLCPFAIL;
70 if (local->fif_control)
71 new_flags |= FIF_CONTROL;
73 if (local->fif_other_bss)
74 new_flags |= FIF_OTHER_BSS;
76 changed_flags = local->filter_flags ^ new_flags;
81 local->ops->configure_filter(local_to_hw(local),
82 changed_flags, &new_flags,
83 local->mdev->mc_count,
84 local->mdev->mc_list);
86 WARN_ON(new_flags & (1<<31));
88 local->filter_flags = new_flags & ~(1<<31);
91 /* master interface */
93 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
95 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
99 static const struct header_ops ieee80211_header_ops = {
100 .create = eth_header,
101 .parse = header_parse_80211,
102 .rebuild = eth_rebuild_header,
103 .cache = eth_header_cache,
104 .cache_update = eth_header_cache_update,
107 static int ieee80211_master_open(struct net_device *dev)
109 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
110 struct ieee80211_local *local = mpriv->local;
111 struct ieee80211_sub_if_data *sdata;
112 int res = -EOPNOTSUPP;
114 /* we hold the RTNL here so can safely walk the list */
115 list_for_each_entry(sdata, &local->interfaces, list) {
116 if (netif_running(sdata->dev)) {
125 netif_tx_start_all_queues(local->mdev);
130 static int ieee80211_master_stop(struct net_device *dev)
132 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
133 struct ieee80211_local *local = mpriv->local;
134 struct ieee80211_sub_if_data *sdata;
136 /* we hold the RTNL here so can safely walk the list */
137 list_for_each_entry(sdata, &local->interfaces, list)
138 if (netif_running(sdata->dev))
139 dev_close(sdata->dev);
144 static void ieee80211_master_set_multicast_list(struct net_device *dev)
146 struct ieee80211_master_priv *mpriv = netdev_priv(dev);
147 struct ieee80211_local *local = mpriv->local;
149 ieee80211_configure_filter(local);
152 /* everything else */
154 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_if_conf conf;
159 if (WARN_ON(!netif_running(sdata->dev)))
162 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
165 if (!local->ops->config_interface)
168 memset(&conf, 0, sizeof(conf));
169 conf.changed = changed;
171 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
172 sdata->vif.type == NL80211_IFTYPE_ADHOC) {
173 conf.bssid = sdata->u.sta.bssid;
174 conf.ssid = sdata->u.sta.ssid;
175 conf.ssid_len = sdata->u.sta.ssid_len;
176 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
177 conf.bssid = sdata->dev->dev_addr;
178 conf.ssid = sdata->u.ap.ssid;
179 conf.ssid_len = sdata->u.ap.ssid_len;
180 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
181 u8 zero[ETH_ALEN] = { 0 };
190 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
193 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
196 return local->ops->config_interface(local_to_hw(local),
200 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
202 struct ieee80211_channel *chan;
208 if (local->sw_scanning)
209 chan = local->scan_channel;
211 chan = local->oper_channel;
213 if (chan != local->hw.conf.channel) {
214 local->hw.conf.channel = chan;
215 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
219 if (!local->hw.conf.power_level)
220 power = chan->max_power;
222 power = min(chan->max_power, local->hw.conf.power_level);
223 if (local->hw.conf.power_level != power) {
224 changed |= IEEE80211_CONF_CHANGE_POWER;
225 local->hw.conf.power_level = power;
228 if (changed && local->open_count) {
229 ret = local->ops->config(local_to_hw(local), changed);
231 * HW reconfiguration should never fail, the driver has told
232 * us what it can support so it should live up to that promise.
240 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
243 struct ieee80211_local *local = sdata->local;
245 if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN))
251 if (local->ops->bss_info_changed)
252 local->ops->bss_info_changed(local_to_hw(local),
254 &sdata->vif.bss_conf,
258 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
260 sdata->vif.bss_conf.use_cts_prot = false;
261 sdata->vif.bss_conf.use_short_preamble = false;
262 sdata->vif.bss_conf.use_short_slot = false;
263 return BSS_CHANGED_ERP_CTS_PROT |
264 BSS_CHANGED_ERP_PREAMBLE |
265 BSS_CHANGED_ERP_SLOT;
268 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
271 struct ieee80211_local *local = hw_to_local(hw);
272 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
275 skb->dev = local->mdev;
276 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
277 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
278 &local->skb_queue : &local->skb_queue_unreliable, skb);
279 tmp = skb_queue_len(&local->skb_queue) +
280 skb_queue_len(&local->skb_queue_unreliable);
281 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
282 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
283 dev_kfree_skb_irq(skb);
285 I802_DEBUG_INC(local->tx_status_drop);
287 tasklet_schedule(&local->tasklet);
289 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
291 static void ieee80211_tasklet_handler(unsigned long data)
293 struct ieee80211_local *local = (struct ieee80211_local *) data;
295 struct ieee80211_rx_status rx_status;
296 struct ieee80211_ra_tid *ra_tid;
298 while ((skb = skb_dequeue(&local->skb_queue)) ||
299 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
300 switch (skb->pkt_type) {
301 case IEEE80211_RX_MSG:
302 /* status is in skb->cb */
303 memcpy(&rx_status, skb->cb, sizeof(rx_status));
304 /* Clear skb->pkt_type in order to not confuse kernel
307 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
309 case IEEE80211_TX_STATUS_MSG:
311 ieee80211_tx_status(local_to_hw(local), skb);
313 case IEEE80211_DELBA_MSG:
314 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
315 ieee80211_stop_tx_ba_cb(local_to_hw(local),
316 ra_tid->ra, ra_tid->tid);
319 case IEEE80211_ADDBA_MSG:
320 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
321 ieee80211_start_tx_ba_cb(local_to_hw(local),
322 ra_tid->ra, ra_tid->tid);
333 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
334 * make a prepared TX frame (one that has been given to hw) to look like brand
335 * new IEEE 802.11 frame that is ready to go through TX processing again.
337 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
338 struct ieee80211_key *key,
341 unsigned int hdrlen, iv_len, mic_len;
342 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
344 hdrlen = ieee80211_hdrlen(hdr->frame_control);
349 switch (key->conf.alg) {
352 mic_len = WEP_ICV_LEN;
355 iv_len = TKIP_IV_LEN;
356 mic_len = TKIP_ICV_LEN;
359 iv_len = CCMP_HDR_LEN;
360 mic_len = CCMP_MIC_LEN;
366 if (skb->len >= hdrlen + mic_len &&
367 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
368 skb_trim(skb, skb->len - mic_len);
369 if (skb->len >= hdrlen + iv_len) {
370 memmove(skb->data + iv_len, skb->data, hdrlen);
371 hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len);
375 if (ieee80211_is_data_qos(hdr->frame_control)) {
376 hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
377 memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data,
378 hdrlen - IEEE80211_QOS_CTL_LEN);
379 skb_pull(skb, IEEE80211_QOS_CTL_LEN);
383 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
384 struct sta_info *sta,
387 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
389 sta->tx_filtered_count++;
392 * Clear the TX filter mask for this STA when sending the next
393 * packet. If the STA went to power save mode, this will happen
394 * when it wakes up for the next time.
396 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
399 * This code races in the following way:
401 * (1) STA sends frame indicating it will go to sleep and does so
402 * (2) hardware/firmware adds STA to filter list, passes frame up
403 * (3) hardware/firmware processes TX fifo and suppresses a frame
404 * (4) we get TX status before having processed the frame and
405 * knowing that the STA has gone to sleep.
407 * This is actually quite unlikely even when both those events are
408 * processed from interrupts coming in quickly after one another or
409 * even at the same time because we queue both TX status events and
410 * RX frames to be processed by a tasklet and process them in the
411 * same order that they were received or TX status last. Hence, there
412 * is no race as long as the frame RX is processed before the next TX
413 * status, which drivers can ensure, see below.
415 * Note that this can only happen if the hardware or firmware can
416 * actually add STAs to the filter list, if this is done by the
417 * driver in response to set_tim() (which will only reduce the race
418 * this whole filtering tries to solve, not completely solve it)
419 * this situation cannot happen.
421 * To completely solve this race drivers need to make sure that they
422 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
424 * (b) always process RX events before TX status events if ordering
425 * can be unknown, for example with different interrupt status
428 if (test_sta_flags(sta, WLAN_STA_PS) &&
429 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
430 ieee80211_remove_tx_extra(local, sta->key, skb);
431 skb_queue_tail(&sta->tx_filtered, skb);
435 if (!test_sta_flags(sta, WLAN_STA_PS) &&
436 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
437 /* Software retry the packet once */
438 info->flags |= IEEE80211_TX_CTL_REQUEUE;
439 ieee80211_remove_tx_extra(local, sta->key, skb);
444 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
446 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
447 "queue_len=%d PS=%d @%lu\n",
448 wiphy_name(local->hw.wiphy),
449 skb_queue_len(&sta->tx_filtered),
450 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
455 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
457 struct sk_buff *skb2;
458 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
459 struct ieee80211_local *local = hw_to_local(hw);
460 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
463 struct ieee80211_supported_band *sband;
464 struct ieee80211_tx_status_rtap_hdr *rthdr;
465 struct ieee80211_sub_if_data *sdata;
466 struct net_device *prev_dev = NULL;
467 struct sta_info *sta;
471 sta = sta_info_get(local, hdr->addr1);
474 if (info->status.excessive_retries &&
475 test_sta_flags(sta, WLAN_STA_PS)) {
477 * The STA is in power save mode, so assume
478 * that this TX packet failed because of that.
480 ieee80211_handle_filtered_frame(local, sta, skb);
485 fc = hdr->frame_control;
487 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
488 (ieee80211_is_data_qos(fc))) {
492 qc = ieee80211_get_qos_ctl(hdr);
494 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
495 & IEEE80211_SCTL_SEQ);
496 ieee80211_send_bar(sta->sdata, hdr->addr1,
500 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
501 ieee80211_handle_filtered_frame(local, sta, skb);
505 if (info->status.excessive_retries)
506 sta->tx_retry_failed++;
507 sta->tx_retry_count += info->status.retry_count;
510 sband = local->hw.wiphy->bands[info->band];
511 rate_control_tx_status(local, sband, sta, skb);
516 ieee80211_led_tx(local, 0);
519 * Fragments are passed to low-level drivers as separate skbs, so these
520 * are actually fragments, not frames. Update frame counters only for
521 * the first fragment of the frame. */
523 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
524 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
526 if (info->flags & IEEE80211_TX_STAT_ACK) {
528 local->dot11TransmittedFrameCount++;
529 if (is_multicast_ether_addr(hdr->addr1))
530 local->dot11MulticastTransmittedFrameCount++;
531 if (info->status.retry_count > 0)
532 local->dot11RetryCount++;
533 if (info->status.retry_count > 1)
534 local->dot11MultipleRetryCount++;
537 /* This counter shall be incremented for an acknowledged MPDU
538 * with an individual address in the address 1 field or an MPDU
539 * with a multicast address in the address 1 field of type Data
541 if (!is_multicast_ether_addr(hdr->addr1) ||
542 type == IEEE80211_FTYPE_DATA ||
543 type == IEEE80211_FTYPE_MGMT)
544 local->dot11TransmittedFragmentCount++;
547 local->dot11FailedCount++;
550 /* this was a transmitted frame, but now we want to reuse it */
554 * This is a bit racy but we can avoid a lot of work
557 if (!local->monitors && !local->cooked_mntrs) {
562 /* send frame to monitor interfaces now */
564 if (skb_headroom(skb) < sizeof(*rthdr)) {
565 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
570 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
571 skb_push(skb, sizeof(*rthdr));
573 memset(rthdr, 0, sizeof(*rthdr));
574 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
575 rthdr->hdr.it_present =
576 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
577 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
579 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
580 !is_multicast_ether_addr(hdr->addr1))
581 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
583 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
584 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
585 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
586 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
587 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
589 rthdr->data_retries = info->status.retry_count;
591 /* XXX: is this sufficient for BPF? */
592 skb_set_mac_header(skb, 0);
593 skb->ip_summed = CHECKSUM_UNNECESSARY;
594 skb->pkt_type = PACKET_OTHERHOST;
595 skb->protocol = htons(ETH_P_802_2);
596 memset(skb->cb, 0, sizeof(skb->cb));
599 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
600 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
601 if (!netif_running(sdata->dev))
605 skb2 = skb_clone(skb, GFP_ATOMIC);
607 skb2->dev = prev_dev;
612 prev_dev = sdata->dev;
623 EXPORT_SYMBOL(ieee80211_tx_status);
625 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
626 const struct ieee80211_ops *ops)
628 struct ieee80211_local *local;
632 /* Ensure 32-byte alignment of our private data and hw private data.
633 * We use the wiphy priv data for both our ieee80211_local and for
634 * the driver's private data
636 * In memory it'll be like this:
638 * +-------------------------+
640 * +-------------------------+
641 * | struct ieee80211_local |
642 * +-------------------------+
643 * | driver's private data |
644 * +-------------------------+
647 priv_size = ((sizeof(struct ieee80211_local) +
648 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
651 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
656 wiphy->privid = mac80211_wiphy_privid;
658 local = wiphy_priv(wiphy);
659 local->hw.wiphy = wiphy;
661 local->hw.priv = (char *)local +
662 ((sizeof(struct ieee80211_local) +
663 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
668 BUG_ON(!ops->config);
669 BUG_ON(!ops->add_interface);
670 BUG_ON(!ops->remove_interface);
671 BUG_ON(!ops->configure_filter);
674 local->hw.queues = 1; /* default */
676 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
677 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
678 local->hw.conf.long_frame_max_tx_count = 4;
679 local->hw.conf.short_frame_max_tx_count = 7;
680 local->hw.conf.radio_enabled = true;
682 INIT_LIST_HEAD(&local->interfaces);
684 spin_lock_init(&local->key_lock);
686 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
688 sta_info_init(local);
690 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
691 (unsigned long)local);
692 tasklet_disable(&local->tx_pending_tasklet);
694 tasklet_init(&local->tasklet,
695 ieee80211_tasklet_handler,
696 (unsigned long) local);
697 tasklet_disable(&local->tasklet);
699 skb_queue_head_init(&local->skb_queue);
700 skb_queue_head_init(&local->skb_queue_unreliable);
702 return local_to_hw(local);
704 EXPORT_SYMBOL(ieee80211_alloc_hw);
706 int ieee80211_register_hw(struct ieee80211_hw *hw)
708 struct ieee80211_local *local = hw_to_local(hw);
711 enum ieee80211_band band;
712 struct net_device *mdev;
713 struct ieee80211_master_priv *mpriv;
716 * generic code guarantees at least one band,
717 * set this very early because much code assumes
718 * that hw.conf.channel is assigned
720 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
721 struct ieee80211_supported_band *sband;
723 sband = local->hw.wiphy->bands[band];
725 /* init channel we're on */
726 local->hw.conf.channel =
727 local->oper_channel =
728 local->scan_channel = &sband->channels[0];
733 /* if low-level driver supports AP, we also support VLAN */
734 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
735 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
737 /* mac80211 always supports monitor */
738 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
740 result = wiphy_register(local->hw.wiphy);
745 * We use the number of queues for feature tests (QoS, HT) internally
746 * so restrict them appropriately.
748 if (hw->queues > IEEE80211_MAX_QUEUES)
749 hw->queues = IEEE80211_MAX_QUEUES;
750 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
751 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
753 hw->ampdu_queues = 0;
755 mdev = alloc_netdev_mq(sizeof(struct ieee80211_master_priv),
756 "wmaster%d", ether_setup,
757 ieee80211_num_queues(hw));
759 goto fail_mdev_alloc;
761 mpriv = netdev_priv(mdev);
762 mpriv->local = local;
765 ieee80211_rx_bss_list_init(local);
767 mdev->hard_start_xmit = ieee80211_master_start_xmit;
768 mdev->open = ieee80211_master_open;
769 mdev->stop = ieee80211_master_stop;
770 mdev->type = ARPHRD_IEEE80211;
771 mdev->header_ops = &ieee80211_header_ops;
772 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
774 name = wiphy_dev(local->hw.wiphy)->driver->name;
775 local->hw.workqueue = create_freezeable_workqueue(name);
776 if (!local->hw.workqueue) {
782 * The hardware needs headroom for sending the frame,
783 * and we need some headroom for passing the frame to monitor
784 * interfaces, but never both at the same time.
786 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
787 sizeof(struct ieee80211_tx_status_rtap_hdr));
789 debugfs_hw_add(local);
791 if (local->hw.conf.beacon_int < 10)
792 local->hw.conf.beacon_int = 100;
794 if (local->hw.max_listen_interval == 0)
795 local->hw.max_listen_interval = 1;
797 local->hw.conf.listen_interval = local->hw.max_listen_interval;
799 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
800 IEEE80211_HW_SIGNAL_DB |
801 IEEE80211_HW_SIGNAL_DBM) ?
802 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
803 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
804 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
805 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
806 local->wstats_flags |= IW_QUAL_DBM;
808 result = sta_info_start(local);
813 result = dev_alloc_name(local->mdev, local->mdev->name);
817 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
818 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
820 result = register_netdevice(local->mdev);
824 result = ieee80211_init_rate_ctrl_alg(local,
825 hw->rate_control_algorithm);
827 printk(KERN_DEBUG "%s: Failed to initialize rate control "
828 "algorithm\n", wiphy_name(local->hw.wiphy));
832 result = ieee80211_wep_init(local);
835 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
836 wiphy_name(local->hw.wiphy), result);
840 local->mdev->select_queue = ieee80211_select_queue;
842 /* add one default STA interface */
843 result = ieee80211_if_add(local, "wlan%d", NULL,
844 NL80211_IFTYPE_STATION, NULL);
846 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
847 wiphy_name(local->hw.wiphy));
851 ieee80211_led_init(local);
856 rate_control_deinitialize(local);
858 unregister_netdevice(local->mdev);
862 sta_info_stop(local);
864 debugfs_hw_del(local);
865 destroy_workqueue(local->hw.workqueue);
868 free_netdev(local->mdev);
870 wiphy_unregister(local->hw.wiphy);
873 EXPORT_SYMBOL(ieee80211_register_hw);
875 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
877 struct ieee80211_local *local = hw_to_local(hw);
879 tasklet_kill(&local->tx_pending_tasklet);
880 tasklet_kill(&local->tasklet);
885 * At this point, interface list manipulations are fine
886 * because the driver cannot be handing us frames any
887 * more and the tasklet is killed.
890 /* First, we remove all virtual interfaces. */
891 ieee80211_remove_interfaces(local);
893 /* then, finally, remove the master interface */
894 unregister_netdevice(local->mdev);
898 ieee80211_rx_bss_list_deinit(local);
899 ieee80211_clear_tx_pending(local);
900 sta_info_stop(local);
901 rate_control_deinitialize(local);
902 debugfs_hw_del(local);
904 if (skb_queue_len(&local->skb_queue)
905 || skb_queue_len(&local->skb_queue_unreliable))
906 printk(KERN_WARNING "%s: skb_queue not empty\n",
907 wiphy_name(local->hw.wiphy));
908 skb_queue_purge(&local->skb_queue);
909 skb_queue_purge(&local->skb_queue_unreliable);
911 destroy_workqueue(local->hw.workqueue);
912 wiphy_unregister(local->hw.wiphy);
913 ieee80211_wep_free(local);
914 ieee80211_led_exit(local);
915 free_netdev(local->mdev);
917 EXPORT_SYMBOL(ieee80211_unregister_hw);
919 void ieee80211_free_hw(struct ieee80211_hw *hw)
921 struct ieee80211_local *local = hw_to_local(hw);
923 wiphy_free(local->hw.wiphy);
925 EXPORT_SYMBOL(ieee80211_free_hw);
927 static int __init ieee80211_init(void)
932 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
933 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
934 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
936 ret = rc80211_minstrel_init();
940 ret = rc80211_pid_init();
944 ieee80211_debugfs_netdev_init();
949 static void __exit ieee80211_exit(void)
952 rc80211_minstrel_exit();
955 * For key todo, it'll be empty by now but the work
956 * might still be scheduled.
958 flush_scheduled_work();
963 ieee80211_debugfs_netdev_exit();
967 subsys_initcall(ieee80211_init);
968 module_exit(ieee80211_exit);
970 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
971 MODULE_LICENSE("GPL");